630.txt

This is the snapshot of Snot Latest Rules

Rule: 

-- 
Sid:630

-- 
Summary:
A host has scanned the network looking for vulnerable servers.

-- 
Impact:
Information leak, reconnaisance, preperation for automated attack such as worm propagation


-- 
Detailed Information: 
Synscan is the scanning and vulnerability testing engines for ramen, canserserver and is included in some versions of the t0rn root kit as t0rnscan. It is a very fast syn scanner. 

-- 
Attack Scenarios: 
This is a scanning tool that is often the precursor to a worm infection.


-- 
Ease of Attack: 
This scanner is fast and easy to use. It is readily available and was included with several worms.


-- 
False Positives: 
sscan, mscan, and several other tools used ID=39426 but the use of SYNFIN is unique to synscan [1.5|1.6]

-- 
False Negatives: 
This rule will not generate an event if recent versions of synScan, such as 1.6a, are used because synScan now uses random IP IDs.

-- 
Corrective Action: 
Run flexresp with synscan kill.

-- 
Contributors: 
Don Smith	Initial Research
Josh Gray	Edits

-- 
Additional References:



--